ability to specify new GID with useradd on user creation

Hi all,

what do u think about this:

Description:
The customer needs to create specific unique GID's for users when added. 
They would like a command line option to do so. This patch implements 
the functionality so that the '-a' flag will request the GID creation 
and assignment:

[root@testserver1 redhat]# useradd -u 1000 -a 1001 joeblow
[root@testserver1 redhat]# grep joeblow /etc/{passwd,group}
/etc/passwd:joeblow:x:1000:1001::/home/joeblow:/bin/bash
/etc/group:joeblow:x:1001:
[root@testserver1 redhat]# ls -l /home/ | grep joeblow
drwx------    3 joeblow  joeblow      4096 Mar 18 10:36 joeblow
[root@testserver1 redhat]# ls -ln /home/ | grep joeblow
drwx------    3 1000     1001         4096 Mar 18 10:36 joeblow


I don't think u like it, neither do i. I just want to know upstream opinion.